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Commit 00669d19 authored by Maxim Sloyko's avatar Maxim Sloyko Committed by Guenter Roeck
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hwmon: (pmbus/ir38064) Add driver for Infineon IR38064 Voltage Regulator 



Add the pmbus driver for the Infineon ir38064 voltage regulator.

VOUT_MODE is not supported by the device.  The driver fakes linear16
mode with exponent value -8.

The device supports VOUT_PEAK, IOUT_PEAK, and TEMPERATURE_PEAK, however
this driver does not enable them.

Signed-off-by: default avatarMaxim Sloyko <maxims@google.com>
Signed-off-by: default avatarPatrick Venture <venture@google.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent c49b7b39

Documentation/hwmon/ir38064

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Kernel driver ir38064

=====================



Supported chips:

  * Infineon IR38064

    Prefix: 'ir38064'

    Addresses scanned: -

    Datasheet: Publicly available at the Infineon webiste

      https://www.infineon.com/dgdl/Infineon-IR38064MTRPBF-DS-v03_07-EN.pdf?fileId=5546d462584d1d4a0158db0d9efb67ca



Datasheet is not publicly available.





Authors:

        Maxim Sloyko <maxims@google.com>

        Patrick Venture <venture@google.com>



Description

-----------



IR38064 is a Single-input Voltage, Synchronous Buck Regulator, DC-DC Converter.



Usage Notes

-----------



This driver does not probe for PMBus devices. You will have to instantiate

devices explicitly.



Sysfs attributes

----------------



curr1_label		"iout1"

curr1_input		Measured output current

curr1_crit		Critical maximum current

curr1_crit_alarm	Current critical high alarm

curr1_max		Maximum current

curr1_max_alarm	Current high alarm



in1_label		"vin"

in1_input		Measured input voltage

in1_crit		Critical maximum input voltage

in1_crit_alarm		Input voltage critical high alarm

in1_min		Minimum input voltage

in1_min_alarm		Input voltage low alarm



in2_label		"vout1"

in2_input		Measured output voltage

in2_lcrit		Critical minimum output voltage

in2_lcrit_alarm	Output voltage critical low alarm

in2_crit		Critical maximum output voltage

in2_crit_alarm		Output voltage critical high alarm

in2_max		Maximum output voltage

in2_max_alarm		Output voltage high alarm

in2_min		Minimum output voltage

in2_min_alarm		Output voltage low alarm



power1_label		"pout1"

power1_input		Measured output power



temp1_input		Measured temperature

temp1_crit		Critical high temperature

temp1_crit_alarm	Chip temperature critical high alarm

temp1_max		Maximum temperature

temp1_max_alarm	Chip temperature high alarm

drivers/hwmon/pmbus/Kconfig

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@@ -54,6 +54,15 @@ config SENSORS_IR35221 
	  This driver can also be built as a module. If so, the module will

	  be called ir35521.



config SENSORS_IR38064

	tristate "Infineon IR38064"

	help

	  If you say yes here you get hardware monitoring support for Infineon

	  IR38064.



	  This driver can also be built as a module. If so, the module will

	  be called ir38064.



config SENSORS_LM25066

	tristate "National Semiconductor LM25066 and compatibles"

	help

drivers/hwmon/pmbus/Makefile

+1 −0
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@@ -8,6 +8,7 @@ obj-$(CONFIG_SENSORS_PMBUS) += pmbus.o 
obj-$(CONFIG_SENSORS_ADM1275)	+= adm1275.o

obj-$(CONFIG_SENSORS_IBM_CFFPS)	+= ibm-cffps.o

obj-$(CONFIG_SENSORS_IR35221)	+= ir35221.o

obj-$(CONFIG_SENSORS_IR38064)	+= ir38064.o

obj-$(CONFIG_SENSORS_LM25066)	+= lm25066.o

obj-$(CONFIG_SENSORS_LTC2978)	+= ltc2978.o

obj-$(CONFIG_SENSORS_LTC3815)	+= ltc3815.o

drivers/hwmon/pmbus/ir38064.c

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// SPDX-License-Identifier: GPL-2.0+

/*

 * Hardware monitoring driver for Infineon IR38064

 *

 * Copyright (c) 2017 Google Inc

 *

 * VOUT_MODE is not supported by the device. The driver fakes VOUT linear16

 * mode with exponent value -8 as direct mode with m=256/b=0/R=0.

 *          

 * The device supports VOUT_PEAK, IOUT_PEAK, and TEMPERATURE_PEAK, however

 * this driver does not currently support them.

 */



#include <linux/err.h>

#include <linux/i2c.h>

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include "pmbus.h"



static struct pmbus_driver_info ir38064_info = {

	.pages = 1,

	.format[PSC_VOLTAGE_IN] = linear,

	.format[PSC_VOLTAGE_OUT] = direct,

	.format[PSC_CURRENT_OUT] = linear,

	.format[PSC_POWER] = linear,

	.format[PSC_TEMPERATURE] = linear,

	.m[PSC_VOLTAGE_OUT] = 256,

	.b[PSC_VOLTAGE_OUT] = 0,

	.R[PSC_VOLTAGE_OUT] = 0,

	.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT

	    | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP

	    | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT

	    | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT

	    | PMBUS_HAVE_POUT,

};



static int ir38064_probe(struct i2c_client *client,

			 const struct i2c_device_id *id)

{

	return pmbus_do_probe(client, id, &ir38064_info);

}



static const struct i2c_device_id ir38064_id[] = {

	{"ir38064", 0},

	{}

};



MODULE_DEVICE_TABLE(i2c, ir38064_id);



/* This is the driver that will be inserted */

static struct i2c_driver ir38064_driver = {

	.driver = {

		   .name = "ir38064",

		   },

	.probe = ir38064_probe,

	.remove = pmbus_do_remove,

	.id_table = ir38064_id,

};



module_i2c_driver(ir38064_driver);



MODULE_AUTHOR("Maxim Sloyko <maxims@google.com>");

MODULE_DESCRIPTION("PMBus driver for Infineon IR38064");

MODULE_LICENSE("GPL");